By Igor V. Yevseyev, Valery M. Yermachenko, Vitaly V. Samartsev
During this booklet, the authors derive the idea of elastic depolarizing collisions and describe their value in a few nonlinear electromagnetic phenomena in gaseous media. The formation of photon echo and an outline of its numerous forms in gaseous media are then offered. The authors exhibit that the features of the corresponding signs count primarily on elastic depolarizing collisions. in addition they give some thought to the benefits of a brand new type of photon echo spectroscopy: polarization photon echo-spectroscopy. A high-level, really expert remedy, Depolarizing Collisions in Nonlinear Electrodynamics will entice researchers and complex graduates in nonlinear optics and quantum electronics.
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Additional info for Depolarizing Collisions in Nonlinear Electrodynamics
However, analysis performed in  was restricted to optically allowed transitions with small angular momenta of the resonant levels. This paper was concentrated on the formation of a photon echo signal by a sequence of two pump pulses linearly polarized in different planes and by sequences of two pulses where the first pulse had a linear polarization, while the second pulse was circularly polarized, or the first pulse was circularly polarized, while the second pulse had a linear polarization, or both pulses were circularly polarized.
76:1212–1225 (1979). 29. Rebane, Opt. Spektrosk. 35:408–417 (1973). © 2004 by CRC Press LLC Chapter 2 METHODS OF THEORETICAL DESCRIPTION OF THE FORMATION OF PHOTON ECHO AND STIMULATED PHOTON ECHO SIGNALS IN GASES In this chapter, we provide a review of early theoretical studies on the photon echo in gases. We derive the basic equations, which will be employed in this monograph for the theoretical description of electromagnetic processes in gas media. For the elementary case when the angular momenta Jb and Ja of the upper (b) and lower (a) resonant levels are equal to 1 and 0, respectively, we analyze the formation of photon echo and stimulated photon echo signals in the case of an inhomogeneously broadened spectral line corresponding to an optically allowed b→a transition.
SAMARTSEV  performed numerical simulations for the ratio tanϕ/tanψ with different values of J in the case when photon echo signals correspond to a narrow spectral line. 1) is about 14% for 10→10 transitions and ← 4% for 10 → 11 transitions. 1) and its accuracy were not analyzed. However, even if we assume that this expression holds true in the case when a broad spectral line is involved in the formation of the photon echo signal, an a priori knowledge that the angular momenta of the levels involved in resonant transitions are high is required for practical applications of this formula.